If you are using 90 mm stormwater pvc pipe for the port you can buy from plumbing supplies a slip sleeve which is used for joining 90 mm pipe. It slips over the pipe and is a very snug fit which would make adjusting port length quite easy. You would only need to remove the lower driver to gain access and once a length is decided use pvc pipe glue to fix it in place. I have to admit i,ve done no testing of my Elsinores as i very much like the way they sound straight off the bat but i will get around to doing so and port length may need a tweek.

ID 96mm cardboard tube is the closest now.... For rolling up wall-to-wall-carpets originally. If i am bnot finding anything else i will start with 120mm length, just to figure out how it reacts with the bigger dia.

WaveGuide for tweeter.. No felt like drawing shows now..
I hear that Hamlet makes a great stereo pair..

I supplied the waveguides already and will pay for tweeters as well as promised..

I can wait for all crossover values and box all parts in one and send together if OTHERS WANT TO SHARE COST for all other parts and shared ship cost..

jdkjake has shown interest.. ANYONE ELSE?

Shipping time is 3 months ground or 1 week express but much higher cost..

I've been out of the loop for some time, but Joel had told me Joe Ras was working on the Hamlets. While I'd love a pair of Elsinores, I don't have the room for them in my modest house and getting my wife to agree to a pair of Zen OBs was hard enough... But I do have room for the Hamlets in my mancave area of the basement.

I have a quad of the drivers and Joel's round waveguides. Are the cabinet dimensions above firm? I know Joe is working on the crossovers, but if the cabinet dimensions are set, then I'll have my carpenter build the boxes and get them veneered or wrapped in leather while I wait for the CO to be finalized.

Also, since I'm saving costs on the cabinets and the reduced driver count, would the more expensive tweeter be a worthwhile upgrade or is the improved performance just not worth the nearly doubled cost? I would be listening to them near field most of the time too, if that will influence the decision. The amp will be a Musical Machine and Yamaha CR620 receiver; with the MM being my main amp.

There are programs (WinISD comes to mind) that allows you to play around with various diameters and lengths and shows the different velocity in Mach

Maybe we can get a consensus that in most cases we do need to make the vent/port 20mm longer?
Cheers, Joe

Playing along with the WinISD Beta 0.44 ended up with a "simulated" box volume of 101 litres for the 90x105mm vent and 33Hz. For us in Sweden (and maybe otherwise) we can instead choose 2 pcs of 68x145mm drain pipes instead, to start measuring from. Which also creates a good 0,12 mach. So it will be. a month search for a deasant pipe is over.

bild.JPGAlmost ready to start measuring the "EU-version" with 2x 75mm (ID68) plumbing pipes. Wool in the back compartment, glass wool on the front compartment walls and on all of the stiffening panel (reflections should not be an issue here). 160mm will be the start, as the pre-calculation said 145mm. The pipe holes was deliberately drilled sliightly to big and adjusted with a few layers of print paper strips around the hole to get it perfectly match, round and smooth. Glued with wallpaper glue. That would make it easier to change and adjust the pipes in and out. Just some small ideas.